I did not manage to adapt the Bootloader code appropriately to get a working HID bootloader. I tested the code on the teensy++2. As I burned the teensy bootloader during my test I have no working bootloader any more. I used the LUFA from GitHub (https://github.com/abcminiuser/lufa hash: 2cde257fe11886bebbfe4aea816268c2739d89bb).